var nbimage= 50;
var width;
var height;
var url;
var alte;
function banniere()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 10)
{
gotosite = "";
url = "Img/logo_automanie.jpg";
alte = "Centre de l'auto Automanie, Repentigny";
}
if (numimage > 10 && numimage <= 20)
{
gotosite = "";
url = "Img/logo_groupe_brissette.jpg";
alte = "Groupe Brissette";
}
if (numimage > 20 && numimage <= 30)
{
gotosite = "";
url = "Img/logo_dsf.jpg";
alte = "Desjardins Sécurité Financière";
}
if (numimage > 30 && numimage <= 40)
{
gotosite = "";
url = "Img/logo_franke.jpg";
alte = "Franke Volvo Mercedes Smart";
}
if (numimage > 40)
{
gotosite = "";
url = "Img/logo_vallee_bleue.jpg";
alte = "Centre de ski Vallée Bleue";
}
if(gotosite != "")
	{
	document.write ('<A HREF="' + gotosite + '">');	
	}
document.write('<IMG SRC="' + url + '" ALT="' + alte + '" BORDER=0 WIDTH=210 HEIGHT=100>')
if(gotosite != "")
	{
	document.write('</A>')
	}
}
<!-- FIN DU SCRIPT -->